Aurora skirt works pretty damn well. You can get that in most shops. It's a kilwell version that I use.

But... If someone is clever enough to get their hands on lunabrite (http://www.lunabrite.com/lunabrite.php) and convert it into a fly tying product...well...it'd eat aurora skirt for breakfast. Dunno how many of you guys have had a play with this stuff, it's only been in the country for bugger all, but it is quite simply phenomenal.

Doll Fly's produce pretty well. My personal favourite is a lumo black booby...but shhhh its a secret.